Wrench



Dec. 6, 1938. I I w. A. PARKER 2,139,600

WRENCH Filed Jan. 25, 1937 mmmmum unluuunumiifi' Patented Dec. 6, 1938 UNITED STATES PATENT OFF 'I-CE 1 Claim.

This invention relates to wrenches, and its general object is to provide an end wrench that includes pivotally connected companion jaw carrying handle members adjustably associated for movement toward and away from each other, with adjustable reinforcing means bridging the members adjacent to the jaw ends thereof, to limit the outward movement, as well as to strengthen and steady the same, and to relieve undue strain on the threaded adjusting screw of the members, therefore the wrench is capable of performing its intended function without fear of damage to or breakage of the parts.

Another object of the invention is to provide a wrench of the character set forth, that is simple in construction, inexpensive to manufacture and extremely eflicient in use, operation and service.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawing and specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to the accompanying drawing wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure 1 is a perspective view of the wrench which forms the subject matter of the present invention.

Figure 2 is a side elevation of the wrench with parts in section and illustrates the degree of taper of the shank portions of the screw for adjusting the jaw members.

Figure 3 is a detail view illustrating the association of the adjusting screw with one of the companion members.

Referring to the drawing in detail, it will be noted that my wrench includes a pair of com panion jaw carrying elongated handle members indicated by the reference numerals I and 2 and which have fiat confronting faces for disposal in contacting engagement with each other, as clearly shown in Figure 1. The members are tapered slightly toward one end, and the member 2 is enlarged as at 3, the enlarged portion being recessed to receive the reduced end 4 of the member I, and both the enlarged portion and reduced end 4 are provided with openings for a pivot bolt 5, therefore it will be seen that the members are pivotally connected at one end for movement toward and away from each other.

The ends of the members opposed to the pivoted ends are enlarged in curved formation to provide what may be termed a body 6 for each member, and it will be noted that the outer side faces of thebodies of the members are recessed longitudinally as at 'I in channel formation, to provide a pocket for the outer ends of the adjusting screw 8 which will be presently described, therefore it will be seen from Figure 1, that the threads at the outer ends of the adjusting screw are protected and the flanges provided by the recesses tend to strengthen the jaws.

The body portion of each of the members have threaded bores extending transversely therethrough to threadedly receive the opposed shank portions of the adjusting screw, and it will be obvious that the threads of one shank portion extend in opposed direction to those of the other shank portion, or in other words, right and left hand threads are provided for the shank portions so that upon rotation of the adjusting screw, the members will be moved toward and away from each other.

An adjusting wheel 9 is formed on or otherwise secured to the adjusting screw 8 midway the ends thereof, and the confronting faces of the bodies of the members I and 2 are recessed as at I0 to provide pockets for the wheel 9 which is shown as having a serrated periphery to facilitate the rotation thereof as will be apparent, and the front and rear faces of the body portions of the members I and 2 are recessed as at I I, with the wheel 9 extending therein, so that ready access may be had thereto for rotating the same.

The jaw portions I2 are formed by recessing the free ends of the body portions in substantially rectangular formation, as best shown in Figure 1, and the confronting faces of the jaws are toothed in ratchet formation as at I3, with the teeth extending inwardly, as clearly shown in Figure 1.

In order to limit the outward movement of the handle members I and 2, as well as to strengthen the same, and to prevent undue strain on the adjusting screw, I provide a holding means which includes a pair of companion links I4 and I5. The link I4 has its outer end pivotally secured tothe member I, while the link I 5 is pivoted to the member 2, and formed on the inner ends of. the links I4 and I 5 are collars I6, the collar I6 of the link I4 being disposed about the link I5, while the collar of the link I5 is disposed about the link I4 in a manner whereby the links are held associated with respect to each other for slidable movement, as will be apparent upon inspection of Figure 1.

Due to the fact that the free or jaw ends of the members I and 2 move in the arc of a circle when being disposed to open or closed positions, as shown in Figures 1 and 2, the shank portions of the adjusting screw 8 are slightly tapered from the adjusting wheel 9 to their outer-ends, as best shown in Figure 2, especially by the dot and dash lines, to provide suificient looseness or play between the threads of the screw and the bores, as best shown in Figure 3, so as to prevent binding of the screw in the bores and free movement thereof, for adjusting the jaws toward and away from each other.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided being engageable to limit outward movement of the jaws.

WILLIAM A. PARKER. 

